NSL1422RC Class B is a fuel resistant sealant for use on integral fuel tanks and pressurized cabins as well as other areas subject to contact with aircraft fuels, lubricants, oils, water and/or weathering. This Class B two-part polysulfide base compound cures at room temperature to a flexible, resilient rubber.Model (EDMO# 1422B2QT) is Class B, one quart size with a 2 hour work time.
